As Nicole mentioned, there are certain things that don't change. I think the best example I can give you of adaptation, because protocol is to make everyone feel comfortable, is last summer during the last royal tour, the individual who had precedence decided that because they were guests, he wanted to give up his precedence and walk into the room after them, just as a mark of courtesy and respect, and to be as welcoming as possible.
That's the sort of adaptation that happens. They're not big steps. There will be guards of honour in the same fashion every time. Those elements remain the same, but some small elements can change, where an individual will decide that they prefer to make their guests feel welcome, or something of that nature.